©
本文档使用
php.cn手册 发布
(PHP 7)
IntlChar::isdefined — Check whether the code point is defined
$codepoint
)Determines whether the specified code point is "defined", which usually means that it is assigned a character.
TRUE
for general categories other than "Cn" (other, not assigned).
Note:
Note that non-character code points (e.g., U+FDD0) are not "defined" (they are Cn), but surrogate code points are "defined" (Cs).
codepoint
The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")
Returns TRUE
if
codepoint
is a defined character, FALSE
if not.
Example #1 Testing different code points
<?php
var_dump ( IntlChar :: isdefined ( "A" ));
var_dump ( IntlChar :: isdefined ( " " ));
var_dump ( IntlChar :: isdefined ( "\u{FDD0}" ));
?>
以上例程会输出:
bool(true) bool(true) bool(false)